发明授权
- 专利标题: Method and an apparatus for use of codes in multicast transmission
- 专利标题(中): 多播传输中使用代码的方法和装置
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申请号: US09835903申请日: 2001-04-16
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公开(公告)号: US08656246B2公开(公告)日: 2014-02-18
- 发明人: Nagabhushana T. Sindhushayana , Jack K. Wolf
- 申请人: Nagabhushana T. Sindhushayana , Jack K. Wolf
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM Incorporated
- 当前专利权人: QUALCOMM Incorporated
- 当前专利权人地址: US CA San Diego
- 代理商 Larry J. Moskowitz
- 主分类号: H03M13/00
- IPC分类号: H03M13/00
摘要:
A method and apparatus for multicasting of a multi-packet message are disclosed. Data to be transmitted as a message are divided into N sets, each set being encoded to generate encoded data. A set of parity bits is separated from each of the N sets of encoded data. The N sets of separated parity bits are encoded by a systematic code with a predetermined distance S across the N sets, resulting in N′ parity-bit packets. The N′ parity-bit packets are encoded with a code that is selected so that each receiving station decodes the N′ parity-bit packets with a high probability. The N-packet message, comprising the N sets of encoded data less the separated bits, and the N′ packets are multicasted. If less than S packets of the N-packet message fail to decode at a receiving station, the receiving station recovers all N packets using the N′ packets.
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